need help Bad-excuse me for being stupid

You probably won't notice any difference.
A spark is a spark, for the most part no matter what the actual application is.
The heat range and reach are more important than what they are used in, and in your case they are the same heat range just different reach.
The shorter one will very slightly lower the compression, but like I said you wont notice any difference in the way the car runs between the two.

One thing to consider is that the longer plug could interfere with a piston (apparently not the case on your engine0, but the plug could be getting hotter at the tip than it was designed for because of it not being able to carry the heat off to the head as well as the shorter plug. (More plug exposed to the cylinder and not in contact with the threads in the head.)

Dammit Lance :-)
Are you following me?